  <template>
    <a-layout>
      <a-layout-content
          :style="{ background: '#fff', padding: '24px', margin: 0, minHeight: '280px' }"
      >
        <div class="about">
          <h1>分类管理</h1>
        </div>

        <p>
          <a-form layout="inline" :model="param">
            <a-form-item>
              <a-button type="primary" @click="handleQuery()">
                查询
              </a-button>
            </a-form-item>
            <a-form-item>
              <a-button type="primary" @click="add()">
                新增
              </a-button>
            </a-form-item>
          </a-form>
        </p>

        <a-table
            :columns="columns"
            :row-key="record => record.id"
            :data-source="level1"
            :pagination="false"
            :loading="loading">    <!-- 点击分页时，执行该方法 -->

          <!-- 定义两个渲染，第一个是封面图，第二个是按钮 -->
          <template #cover="{ text: cover }">
            <img v-if="cover" :src="cover" alt="avatar" />
          </template>

          <template v-slot:action="{ text: record }">
            <a-space size="small">
              <a-button type="primary" @click="edit(record)">
                编辑
              </a-button>
              <a-popconfirm
                  title="删除后不可恢复，确认删除？"
                  ok-text="是"
                  cancel-text="否"
                  @confirm="handleDelete(record.id)"
              >
                <a-button type="danger">
                  删除
                </a-button>
              </a-popconfirm>
            </a-space>
          </template>
        </a-table>
      </a-layout-content>
    </a-layout>
    <a-modal
        title="分类表单"
        v-model:visible="modalVisible"
        :confirm-loading="modalLoading"
        @ok="handleModalOk"
    >
      <a-form :model="category" :label-col="{ span: 6 }"  :wrapper-col="{ span: 18 }">
        <a-form-item label="名称">
          <a-input v-model:value="category.name" />
        </a-form-item>
        <a-form-item label="父分类">
          <a-select
            v-model:value="category.parent"
            ref="select"
            >
            <a-select-option value="0">
              无
            </a-select-option>

            <a-select-option v-for="c in level1" :key="c.id" :value="c.id" :disabled="category.id === c.id">
              {{c.name}}
            </a-select-option>
          </a-select>
        </a-form-item>
        <a-form-item label="顺序">
          <a-input v-model:value="category.sort" />
        </a-form-item>
      </a-form>
    </a-modal>
</template>

<script lang="ts">
  import { defineComponent, onMounted, ref} from 'vue';
  import axios from 'axios';
  import {message} from 'ant-design-vue'
  import {Tool} from "@/util/tool";

  export default defineComponent({
    name: 'AdminCategory',
    setup() {
      const param = ref();
      param.value = {}
      const categorys = ref();
      const loading = ref(false);

      const columns = [
        {
          title: '名称',
          dataIndex: 'name',
        },
        {
          title: '父分类',
          key: 'parent',
          dataIndex: 'parent',
        },
        {
          title: '顺序',
          dataIndex: 'sort',
        },
        {
          title: 'Action',
          key: 'action',
          slots: { customRender: 'action'}
        }
      ];

      /**
       * 一级分类树，children属性就是二级分类
       * [{
       *   id: "",
       *   name: "",
       *   children: [{
       *     id: "",
       *     name: "",
       *   }]
       * }]
       */
      const level1 = ref(); // 一级分类数，children属性就是二级分类

      /**
       * 数据查询
       */
      const handleQuery = () => {
        loading.value = true;
        // 如果不清空现有数据，则编辑保存重新加载数据后，再点编辑，不会显示修改后的数据
        level1.value = [];
        // 通过axios去调用后端的接口
        axios.get("/category/all").then((response) => {
          loading.value = false;
          const data = response.data;
          if (data.success) {
            categorys.value = data.content;
            console.log("原始数组：", categorys.value);

            level1.value = [];
            level1.value = Tool.array2Tree(categorys.value, 0);
            console.log("树形结构：", level1);
          } else {
            message.error(data.message)
          }

        });
      };


      /**
       * 表单
       */
      // 定义一个响应式变量category
      const category = ref({});
      const modalVisible = ref(false);
      const modalLoading = ref(false);
      const handleModalOk = () => {
        modalLoading.value = true;

        // 调用后端接口执行保存操作
        axios.post("/category/save", category.value).then((response) => {
          modalLoading.value = false;
          const data = response.data;   // data = CommonResp
          if (data.success) {
            modalVisible.value = false;

            // 重新加载列表
            handleQuery();
          } else {
            message.error(data.message);
          }
        });

      };

      /**
       * 编辑
       */
      const edit = (record: any) => {
        modalVisible.value = true;
        category.value = Tool.copy(record);
      };

      /**
       * 新增
       */
      const add = () => {
        modalVisible.value = true;
        category.value = {};
      };

      /**
       * 删除分类
       */
      const handleDelete = (id: number) => {
        axios.delete("/category/delete/" + id).then((response) => {
          const data = response.data;
          if (data.success) {
            // 重新加载列表
            handleQuery();
          }
        });
      };

      /**
       * 初始的时候，先查询一次
       * 其中page和size要和后端接受的参数名称对应
       */
      onMounted(() => {
        handleQuery();
      });

      return {
        param,
        //categorys,
        level1,
        columns,
        loading,

        edit,
        add,
        handleDelete,

        handleQuery,

        category,
        modalVisible,
        modalLoading,
        handleModalOk
      }
    }
  });
</script>